{{Short description|Star in the constellation Centaurus}} {{DISPLAYTITLE:x<sup>1</sup> Centauri}} {{for|other stars with this [[Bayer designation]]|x Centauri}} {{Starbox begin | name = x<sup>1</sup> Centauri }} {{Starbox observe | constell = [[Centaurus (constellation)|Centaurus]]<ref name=Anderson_Francis_2012/> | epoch = [[J2000]] | ra = {{RA|12|23|35.420}}<ref name=GaiaDR3/> | dec = {{DEC|−35|24|45.64}}<ref name=GaiaDR3/> | appmag_v = 5.32<ref name=Anderson_Francis_2012/> }} {{Starbox character | type = | class = B8/9V<ref name=houk1979/> | b-v = −0.08<ref name=UBV>{{cite journal | display-authors=1 | last1=Johnson | first1=H. L. | last2=Mitchell | first2=R. I. | last3=Iriarte | first3=B. | last4=Wisniewski | first4=W. Z. | title=Ubvrijkl Photometry of the Bright Stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | pages=99–110 | year=1966 | bibcode=1966CoLPL...4...99J }}</ref> | variable = }} {{Starbox astrometry | radial_v = −10.00<ref name=RV>{{cite journal | title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system | last=Gontcharov | first=G. A. | year=2006 | journal=Astronomy Letters | volume=32 | issue=11 | pages=759–771 | bibcode=2006AstL...32..759G | doi=10.1134/S1063773706110065 | arxiv=1606.08053 | s2cid=119231169 }}</ref> | prop_mo_ra = −42.132 | prop_mo_dec = −6.896 | pm_footnote = <ref name=GaiaDR3/> | parallax = 7.3671 | p_error = 0.0953 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = −0.2<ref>{{cite journal | title=The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes | year=1998 | journal=Astronomy and Astrophysics | volume=330 | issue=619–625 | last1=Jaschek | first1=C. | last2=Gomez | first2=A. E. | page=619 | bibcode=1998A&A...330..619J }}</ref> }} {{Starbox detail | radius = 3.6<ref name=cadars>{{cite journal | display-authors=1 | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Comments and statistics | edition=Third | journal=Astronomy & Astrophysics | volume=367 | pages=521–24 | year=2001 | issue=2 | bibcode=2001A&A...367..521P | doi=10.1051/0004-6361:20000451 | arxiv=astro-ph/0012289 | s2cid=425754 }}</ref> | mass = 3<ref name=grosbol>{{cite journal | title=Space velocities and ages of nearby early-type stars | last=Grosbol | first=P. J. | year=1978 | journal=Astronomy and Astrophysics Supplement Series | volume=32|pages=409–421|bibcode=1978A&AS...32..409G}}</ref> | luminosity = 265<ref name=devancoleurs>{{cite journal | title=Spectral types and luminosities of B, A and F southern stars | last=de Vaucouleurs | first=A. | journal=Monthly Notices of the Royal Astronomical Society | volume=117 | page=449 | year=1957 | issue=4 | bibcode=1957MNRAS.117..449D | doi=10.1093/mnras/117.4.449 | doi-access=free}}</ref> | temperature = 11,300<ref name=grosbol/> | age_gyr = 0.151<ref name=grosbol/> }} {{Starbox catalog | names = {{odlist | B=x<sup>1</sup> Cen | G=113 G. Cen<ref name=devancoleurs/> | CD=−34°8117 | HD=107832 | HIP=60449 | SAO=203420 | HR=4712 | GC=16892 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=HD+107832 }} {{Starbox end}}
'''x<sup>1</sup> Centauri''' is a [[star]] located in the [[constellation]] [[Centaurus (constellation)|Centaurus]]. Its name is a [[Bayer designation]]; it is also known by its designations '''HD 107832''' and '''HR 4712'''. The [[apparent magnitude]] of the [[star]] is about 5.32,<ref name=Anderson_Francis_2012/> meaning it is only visible to the [[naked eye]] under [[Bortle scale|excellent viewing conditions]]. Its distance is about {{convert|443|ly|pc|abbr=out|lk=on}} from Earth based on [[stellar parallax|parallax]] measurements.<ref name=GaiaDR3/>
x<sup>1</sup> Centauri's [[spectral type]] is B8/9V, meaning it is a late [[B-type main sequence star]]. These types of stars are a few times more massive than the [[Sun]], and have [[effective temperature]]s of about 10,000 to 30,000 [[Kelvin|K]]. x<sup>1</sup> Centauri is just over 3 times more massive than the Sun<ref name=grosbol/> and has a temperature of about 11,300 K.<ref name=grosbol/> The star [[X2 Centauri|x<sup>2</sup> Centauri]], which lies about 0.4{{prime}} away from x<sup>1</sup> Centauri, may or may not form a physical [[binary star]] system with x<sup>1</sup> Centauri, as the two have similar [[proper motion]]s and distances.<ref name="SIMBAD"/><ref>{{cite simbad|title=* x2 Cen|access-date=16 January 2017}}</ref>
== References == <references>
<ref name=Anderson_Francis_2012>{{Cite XHIP | 60449 | access-date=2026-01-09 }}</ref>
<ref name=GaiaDR3>{{Cite Gaia DR3 | 6157932866997543296 | mode=cs2 | postscript=. | access-date=2026-01-09 }}</ref>
<ref name=houk1979>{{cite book | last=Houk | first=Nancy | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=3 | date=1979 | publication-place=Ann Arbor, Michigan | publisher=Dept. of Astronomy, University of Michigan | bibcode=1982mcts.book.....H }}</ref>
<ref name=SIMBAD>{{cite simbad | title=* x1 Cen | access-date=15 January 2016 }}</ref>
</references>
{{Stars of Centaurus}}
{{DEFAULTSORT:X1 Centauri}} [[Category:B-type giants]] [[Category:Centaurus]] [[Category:Bayer objects|Centauri, x1]] [[Category:Bright Star Catalogue objects|4712]] [[Category:Durchmusterung objects|CD-34 08117]] [[Category:Gould objects|Centauri, 113]] [[Category:Henry Draper Catalogue objects|107832]] [[Category:Hipparcos objects|60449]]